Tag: "phylogenetic" at biology news

For inferring the biological tree of life, simple is better

...ogy. His laboratory combines computational work on phylogenetic methods with experimental studies to understand how genes evolve new functions. He is particularly interested in the evolution of hormones and the receptor proteins that mediate their effects on the body. In 2003, Thornton resurrected the ancient ge...

Scientists advocate genomic sequencing of 'living fossil'

...ng taxa to occupy the critical, highly informative phylogenetic position between ray-finned fishes and tetrapods. Fleshy, lobed fins, which are one of the defining characteristics of coelacanths, are thought to represent an intermediate evolutionary stage in the transformation of fins to limbs. Lobe-finned rela...

Building a tree of life needs less 'wood'

...m sequence databases, increasing the resolution of phylogenetic trees, he said. ...

Hummingbirds lose power at high altitudes

... few surprises, too, said McGuire, a specialist in phylogenetic analysis of animal groups. While much of the tree confirms earlier results, the world's largest hummingbird, the giant hummingbird (Patagona gigas), stood out on its own, perhaps indicating that it has taken its own evolutionary path away from the ot...

Scientists decipher genome of bacterium that helps clean up major groundwater pollutants

...ata could serve as a foundation for development of phylogenetic and functional marker probes, for detection and mo...ed at TIGR, scientists have learned more about the phylogenetic diversity of microbes. As the leading center for microbial genomics, TIGR has now deciphered the gen...

Tips from the journals of the American Society for Microbiology

...chers. "Further clinical, seroepidemiological and phylogenetic studies would be required to determine the relative importance of CoV-HKU1 compared to other respiratory tract viruses in causing upper and lower respiratory tract infections, its seroprevalence, and the origin of the virus." (P.C.Y. Woo, S.K.P. Lau,...

Scientists find missing link between whale and its closest relative, the hippo

...odactyls. Boisserie and his colleagues conducted a phylogenetic analysis of new and previous hippo, whale and anthracothere fossils and were able to argue persuasively that anthracotheres are the missing link between hippos and cetaceans. While the common ancestor of cetaceans and anthracotheres probably wasn't ...

Researchers find missing genes of ancient organism

...uence. Nanoarchaeum equitans, is a member of a new phylogenetic kingdom in the Archaea containing organisms that are primitive, parasitic and extremophile, or notable for living in the most extreme environments. Surprisingly, Sll's team found that, although the genome of Nanoarchaeum lacks several intact tRNA ge...

Oldest fossil human protein ever sequenced

...t and living species, and to better understand the phylogenetic relationships....

Using molecular technique, researcher identify hospital pool bacterial pathogen

...g them, and making evolutionary-distance trees, or phylogenetic trees. They then were able to match the genetic sequence of the bacterium Mycobacterium avium to the same bacterium found in the lungs of nine lifeguards who had become ill with hypersensitivity pneumonitis, a lung condition that mimics pneumonia sy...

Discovery of an American salamander where it shouldn't be: Korea

...y performed anatomical comparisons and a molecular phylogenetic analysis to determine the relationship between the new salamander and other plethodontids. All these researches are coauthors of the current Nature paper, though Karsen elected not to join them in order to accept their offer to name it after him. To ...

PNAS highlights for the week of May 16 - 20

... Until then, Wilson and Hlldobler offer a combined phylogenetic and ecological "dynastic-succession" hypothesis that ties together existing knowledge. Key events in this history include an initial adaptation to forest ground litter and soil coincident with a surge in flowering plants, then an advance to ecologica...

Ancient DNA confirms single origin of Malagasy primates

... conclusion to be drawn from our study is that the phylogenetic placement of subfossil lemurs adds additional support to the hypothesis that non-human primates colonized Madagascar only once," Yoder said. "However, the limited taxonomic success of our study leaves open the possibility that data from additional ta...

From network to system

...since 2003. His current research interests include phylogenetic combinatorics, molecular evolution and the use of topological methods in proteomics and computational chemistry. Prof. Li Jin (born in 1963) studied genetics at Fudan University in Shanghai, obtained his doctorate in biomedical science/genetics at th...

Bioinformatics reveals new gene regulation system

...onov started their search using a technique called phylogenetic footprinting to review the upstream DNA sequences ...his, they used a bioinformatics approach they call phylogenetic profiling, compiling a list of genomes that clearly contained the NrdR-box and those that clearly di...

Study in Royal Society journal on world's only horned rodent

...ental traits in passerine birds via a comparative, phylogenetic analysis. We provide evidence for the correlated evolution of maternal yolk T concentration and length of the prenatal developmental period; higher yolk T is associated with shorter prenatal development. Our results highlight the need for more studie...

Landmark comparative genomics study highlights the importance of 'junk' DNA in higher eukaryotes

...tions for different nucleotides, and considers the phylogenetic relationships of the species involved. After applying phastCons to multiple alignments of each of the four groups of eukaryotic species, the researchers estimated that only between 3-8% of the human genome was conserved in the other vertebrate specie...

Environment, area and diversification in the Iridaceae plant family

...ies (Imperial College London) and colleagues use a phylogenetic tree of the iris family to show that lineages within the Cape have speciated at a faster rate than those found elsewhere, even in comparison to regions of similar Mediterranean climates. Irises represent a family of herbaceous, seasonal geophytes, an...

DNA traces evolution of extinct sabertooths and the American cheetah-like cat

...closely related to any living felid species. The phylogenetic tree drawn from the new data also shows that the American cheetah-like cat is genetically most closely related to the puma, rather than to the true African cheetah (Acinonyx jubatus). Miracinonyx and the true cheetah Acinonyx show remarkable morphol...

Carnegie Mellon University research reveals how cells process large genes

...ned these experimental data with computational and phylogenetic analyses of several fruitfly and other insect spec...rrect expression of large genes. Bioinformatic and phylogenetic analyses conducted by Lopez also indicate that recursive splicing plays a role in at least 124 fruit...

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(Date:7/28/2014)... and other forms of dementia, but the research community ... of Washington bioengineers have a designed a peptide structure ... normal proteins into a state that,s linked to widespread ... diabetes and Lou Gehrig,s disease. The synthetic molecule blocks ... into an abnormally folded form by targeting a toxic ...
(Date:7/28/2014)... that 73 percent of adult survivors of childhood cancer ... and related health problems by failing to follow a ... of the journal Cancer . , Almost 32 ... in the study had metabolic syndrome, an umbrella term ... obesity, elevated triglyceride and other abnormalities that often occur ...
(Date:7/28/2014)... Research and Markets has announced the addition ... report to their offering. ... biological data. These systems capture biological traits such as ... hand measurements from the subject and compare the data ... of a biometrics system is to identify and verify ...
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